PowerShell script executing batch script on remote server - powershell

Question

I am executing a PowerShell script which executes a batch script at remote server. But in PowerShell script I am not able to handle any failure that could occur in batch script. The batch script is having exit %ERROR_CODE% at the end.
Please let me know how I can catch any error occurred in batch script in the calling PowerShell script.
My PowerShell script is like:
$DBServer = $args[0]
$CustName = $args[1]
$FullBackupPath = $args[2]
$command = "cmd.exe /c DbBackupBatch.cmd " + $FullBackupPath + " " + $CustName
$script = 'Invoke-Expression -Command "' + $command + '"'
$scriptblock = [scriptblock]::Create($script)
try {
Invoke-Command -ComputerName $DBServer -Authentication NegotiateWithImplicitCredential -ErrorAction Stop -ScriptBlock $scriptblock
exit 0
} catch {
$message = $_.Exception.Message
Write-Host $_.Exception.Message
# While executing a Java programs, we get message as below -
# Picked up JAVA_TOOL_OPTIONS: -Xms512m -Xmx512m
# This message is treated as error message by PowerShell, though it is not an error
if (($message.Length -lt 50) -and ($message.Contains('Picked up JAVA_TOOL_OPTIONS:'))) {
exit 0
} else {
Write-Host $_.Exception.Message
exit 1
}
}

Answer 1

Give this a whirl:
$remoteReturnValue = Invoke-Command -ComputerName "DV1IMPSSDB01" -Authentication NegotiateWithImplicitCredential -ScriptBlock {
$cmd = Start-Process "cmd.exe" -Wait -PassThru -ArgumentList "/c timeout 5"
$cmdExitCode = $cmd.ExitCode
if ($cmdExitCode -eq 0) {
return "Success"
}
else {
return "Wuh-oh, we have had a problem... exit code: $cmdExitCode"
}
}
Write-Host $remoteReturnValue -ForegroundColor Magenta

Answer 2

Whatever you're trying to do in PowerShell, Invoke-Expression is practically always the wrong approach. PowerShell can execute batch files all by itself, so you can run DbBackupBatch.cmd directly, without Invoke-Expression and even without cmd /c.
Try something like this:
$DBServer = $args[0]
$CustName = $args[1]
$FullBackupPath = $args[2]
try {
Invoke-Command -ComputerName $DBServer -ScriptBlock {
$output = & DbBackupBatch.cmd $args[0] $args[1] 2>&1
if ($LastExitCode -ne 0) { throw $output }
} -ArgumentList $FullBackupPath, $CustName -Authentication NegotiateWithImplicitCredential
} catch {
Write-Host $_.Exception.Message
exit 1
}
exit 0